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Data Grid

Data Validation

The DataGrid allows you to validate user input. You can apply pre-defined validation rules or custom rules to individual columns.

In this demo, the following rules are used:

  • required
    Specifies that cells should not be empty.
  • pattern
    Specifies a pattern that cell values should match.
  • email
    Specifies that cell values match the Email pattern.
  • async
    Specifies custom validation parameters that are used to validate a value on the server.

For more information on these and other validation rules, refer to the following documentation section: Validation Rules.

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<dx-data-grid id="gridContainer" [dataSource]="dataSource" [columnAutoWidth]="true" [showBorders]="true" [repaintChangesOnly]="true"> <dxo-paging [enabled]="false"></dxo-paging> <dxo-editing mode="batch" [allowUpdating]="true" [allowAdding]="true"> </dxo-editing> <dxi-column dataField="FirstName"> <dxi-validation-rule type="required"></dxi-validation-rule> </dxi-column> <dxi-column dataField="LastName"> <dxi-validation-rule type="required"></dxi-validation-rule> </dxi-column> <dxi-column dataField="Position"> <dxi-validation-rule type="required"></dxi-validation-rule> </dxi-column> <dxi-column dataField="Phone"> <dxi-validation-rule type="required"></dxi-validation-rule> <dxi-validation-rule type="pattern" [pattern]="pattern" message="Your phone must have &#34;(555) 555-5555&#34; format!" ></dxi-validation-rule> </dxi-column> <dxi-column dataField="Email"> <dxi-validation-rule type="required"></dxi-validation-rule> <dxi-validation-rule type="email"></dxi-validation-rule> <dxi-validation-rule type="async" message="Email address is not unique" [validationCallback]="asyncValidation"> </dxi-validation-rule> </dxi-column> </dx-data-grid>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { HttpClient, HttpClientModule } from '@angular/common/http'; import { DxDataGridModule } from 'devextreme-angular'; import * as AspNetData from "devextreme-aspnet-data-nojquery"; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ styleUrls: ['app/app.component.css'], selector: 'demo-app', templateUrl: 'app/app.component.html' }) export class AppComponent { pattern: any = /^\(\d{3}\) \d{3}-\d{4}$/i; constructor(private httpClient: HttpClient) { this.url = "https://js.devexpress.com/Demos/Mvc/api/DataGridEmployeesValidation"; this.dataSource = AspNetData.createStore({ key: "ID", loadUrl: this.url, insertUrl: this.url, updateUrl: this.url, deleteUrl: this.url, onBeforeSend: function(method, ajaxOptions) { ajaxOptions.xhrFields = { withCredentials: true }; } }); this.asyncValidation = this.asyncValidation.bind(this); } asyncValidation(params) { return this.httpClient.post("https://js.devexpress.com/Demos/Mvc/RemoteValidation/CheckUniqueEmailAddress", { id: params.data.ID, email: params.value }, { responseType: "json" }).toPromise(); } } @NgModule({ imports: [ BrowserModule, HttpClientModule, DxDataGridModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ System.config({ transpiler: 'ts', typescriptOptions: { module: "system", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, 'devextreme-aspnet-data-nojquery': { "esModule": true }, 'devextreme/localization.js': { "esModule": true } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.5.3/lib/typescript.js', '@angular': 'npm:@angular', 'tslib': 'npm:tslib@2.0.3/tslib.js', 'rxjs': 'npm:rxjs@6.3.3', 'devextreme-aspnet-data-nojquery': 'npm:devextreme-aspnet-data-nojquery@2.6.1/index.js', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@20.2.3', 'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.9.5/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.0', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.0', 'devextreme-angular': 'npm:devextreme-angular@20.2.3', 'preact': 'npm:preact@10.5.5/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.5/hooks/dist/hooks.js' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js' } }, packageConfigPaths: [ "npm:@angular/*/package.json", "npm:@angular/common/*/package.json", "npm:rxjs/package.json", "npm:rxjs/operators/package.json", "npm:devextreme-angular/*/package.json", "npm:devextreme-angular/ui/*/package.json", "npm:devextreme-angular/package.json", "npm:devexpress-diagram/package.json", "npm:devexpress-gantt/package.json", ] });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.3/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>